// Copyright (C) 2025 woodycpp
//
// This work is licensed under the Creative Commons Attribution-ShareAlike 4.0
// International License. To view a copy of this license, visit
// https://creativecommons.org/licenses/by-sa/4.0/
//
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//   license,
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//     your use.
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#include <gtest/gtest.h>
#include <string>

#include "cal_mul_max.h"

TEST(CalMulMaxTest, Empty) {
    int A[1] = {0};
    int res[1] = {0};
    calMulMax(A, res, 0);
    EXPECT_EQ(res[0], 0);
}

TEST(CalMulMaxTest, SinglePositive) {
    int A[1] = {5};
    int res[1] = {0};
    calMulMax(A, res, 1);
    EXPECT_EQ(res[0], 25);
}

TEST(CalMulMaxTest, SingleNegative) {
    int A[1] = {-5};
    int res[1] = {0};
    calMulMax(A, res, 1);
    EXPECT_EQ(res[0], 25);
}

TEST(CalMulMaxTest, AllPositive) {
    int A[] = {1, 2, 3};
    int res[3];
    int expected[] = {3, 6, 9};
    calMulMax(A, res, 3);
    for (int i = 0; i < 3; i++) {
        EXPECT_EQ(res[i], expected[i]);
    }
}

TEST(CalMulMaxTest, AllNegative) {
    int A[] = {-1, -2, -3};
    int res[3];
    int expected[] = {3, 6, 9};
    calMulMax(A, res, 3);
    for (int i = 0; i < 3; i++) {
        EXPECT_EQ(res[i], expected[i]);
    }
}

TEST(CalMulMaxTest, Mixed) {
    int A[] = {1, 4, -9, 6};
    int res[3];
    int expected[] = {6, 24, 81, 36};
    calMulMax(A, res, 4);
    for (int i = 0; i < 4; i++) {
        EXPECT_EQ(res[i], expected[i]);
    }
}